Application of integrated drilling and stamping technology in gas extraction through layer drilling

In coal mine gas extraction in China, the current hydraulic permeability enhancement measures generally have complex processes, low adaptability, long operation time, and high labor intensity. This makes it challenging to meet requirements of mining enterprises for safe efficient mining, there is an urgent need develop new technologies enhance production. paper proposed integrated drilling stamping technology production integrates drilling, jet fracturing, punching seams. A field test was conducted using specially-developed equipment extract from 16101 bottom pumping lane penetration hole Jiulishan Mine, Jiaozuo, Henan. The results show that compared with previously used mine, time soft seam shortened by 66–75%, output increased 1.7 times, aperture 1.3 times. Hydraulic injection fracturing successfully performed increase hard seams, formed a shot depth 345–539 mm. After drill holes, output, concentration, pure volume, coefficient 2.4, 2.2, 4, 37.3 respectively. flow decay drills holes also further reduced, which significantly improved extractionefficiency. Thus can transform process regular quick, economic, pure, clean extraction. Thus, this has large applicable value underground management mines.